exports.toFixed2=val=>{
  return parseFloat(val).toFixed(2)
}
exports.dateFormat=val=>{
  let date = new Date()
  date.setTime(+val*1000)
  return date.getFullYear() + '年' + (+date.getMonth()+1) +'月' + date.getDate() + '日'+ date.getHours() + ':' + date.getMinutes()
  // return date
}